CN111081132A - Mechanical stirring kettle and experimental measurement device for simulating deep sea oil and gas drilling process - Google Patents
Mechanical stirring kettle and experimental measurement device for simulating deep sea oil and gas drilling process Download PDFInfo
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- CN111081132A CN111081132A CN201911350758.7A CN201911350758A CN111081132A CN 111081132 A CN111081132 A CN 111081132A CN 201911350758 A CN201911350758 A CN 201911350758A CN 111081132 A CN111081132 A CN 111081132A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention discloses a mechanical stirring kettle and an experimental measurement device for simulating a deep sea oil and gas drilling process, wherein the mechanical stirring kettle comprises a kettle body, an upper end cover is arranged on the upper end surface of the kettle body, a lower end cover is arranged on the lower end surface of the kettle body, and a mechanical stirrer capable of moving along the axial direction of the kettle body is inserted into the kettle body from the center of the upper end cover; an annular wall surface capable of performing gas leakage is arranged in the kettle body, the annular wall surface is coaxial with the kettle body and divides the kettle body into an inner layer and an outer layer, the inner layer is used for containing drilling fluid and the mechanical stirrer, and the outer layer is a gas phase space; the gas phase space is communicated with an air inlet hole; and the inner layer space is communicated with a drilling fluid feed inlet, a drilling fluid discharge outlet and an exhaust hole. The mechanical stirring kettle can well restore the environment that high-pressure gas in a leakage stratum continuously leaks into a well in the drilling process of a drill bit, and can investigate and record the operating conditions of the drill bit and drilling fluid in an inner layer and the temperature and pressure change conditions.
Description
Technical Field
The invention relates to the technical field of marine oil and gas exploration, in particular to a mechanical stirring kettle and an experimental measurement device for simulating a deep-sea oil and gas drilling process.
Background
With the increase of energy demand of global economic development and the deep development of marine oil and gas exploration and development, oil and gas drilling develops from a marine shallow water area to a deep water area, when oil and gas drilling is carried out in the deep water area, the possibility of generating natural gas hydrate is increased due to high hydrostatic pressure and low environmental temperature of the sea bottom, and the prevention and treatment research on hydrate in the deep water oil and gas drilling is increasingly paid attention.
The drilling fluid is used as an important working fluid for drilling engineering, and the performance of the drilling fluid and a treating agent thereof plays a role in determining the well completion and drilling cost of a well. In the drilling process, free gas and hydrate decomposed gas in a stratum invade into drilling fluid, the hydrate is easily formed in a seabed low-temperature high-pressure environment, the formation of the hydrate can block a guide pipe, an upper annular space, a blowout preventer, a kill line and the like, the movement of a drill column is limited, the change of the performance of the drilling fluid is caused, and the serious harm is brought to oil gas drilling and production operation. Furthermore, the breakdown of natural gas hydrates in hydrate formations due to the disruption of stable conditions may lead to geological disasters.
Therefore, when deep water and hydrate formations are used for related drilling work, the rheological property and hydrate inhibition property of the used drilling fluid must be researched in a related way so as to adapt to the drilling research of the corresponding formations.
Disclosure of Invention
In order to examine the influence of the drilling process of the drill bit, the embodiment of the invention provides a mechanical stirring tank for simulating deep sea oil and gas drilling.
In order to investigate the influence of formation of solution gas and gas hydrate in the drilling fluid on the rheological property of the drilling fluid and the drilling process of a drill bit, the embodiment of the invention provides an experimental measurement device for simulating the deep sea oil and gas drilling process.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in a first aspect, an embodiment of the invention provides a mechanical stirring kettle for simulating deep sea oil and gas drilling, which comprises a kettle body, wherein an upper end cover is arranged on the upper end surface of the kettle body, a lower end cover is arranged on the lower end surface of the kettle body, and a mechanical stirrer capable of moving along the axial direction of the kettle body is inserted into the kettle body from the center of the upper end cover; an annular wall surface capable of performing gas leakage is arranged in the kettle body, the annular wall surface is coaxial with the kettle body and divides the kettle body into an inner layer and an outer layer, the inner layer is used for containing drilling fluid and the mechanical stirrer, and the outer layer is a gas phase space; the gas phase space is communicated with an air inlet; and the inner layer space is communicated with a drilling fluid feed inlet, a drilling fluid discharge outlet and an exhaust hole.
Furthermore, the reticular stainless steel wall surface of the annular wall surface is fixed, and the internal interlayer is made of one or more of breathable and waterproof silica gel, foamed polyethylene terephthalate or foamed polytetrafluoroethylene.
Further, mechanical agitator includes the drilling rod, the drilling rod is located that one end bilateral symmetry of inlayer space and has distributed two drill bits, and the axis of rotation of drill bit and the axle mutually perpendicular of drilling rod pass through bevel gear interconnect, and the drilling rod outside is the drilling rod protective sheath for the rotation axis of fixed drill bit.
Further, the drill bit can move along the rotating shaft of the drill rod in the operation process of the mechanical stirrer, and when the drill bit moves up and down, the drill rod and the drill rod protective sleeve move synchronously along the axial direction of the drill rod; a drill rod inner retainer is arranged at the joint of the drill rod protective sleeve and the upper end cover; a key groove is formed in the inner retainer of the drill rod and is matched with a key on the drill rod protective sleeve; the drill rod and the drill rod protective sleeve extend out of the kettle body through a central hole of the upper end cover and are fixed through a drill rod outer retainer; the upper top end of the drill rod protective sleeve is a hollow screw rod, the hollow screw rod and a nut nested on the inner side of the drill rod outer retainer form a ball screw, permanent magnets are embedded in the nut and an adjusting ring on the outer side of the drill rod outer retainer and attract each other, and the drill rod protective sleeve is driven to move in the vertical direction by rotating the adjusting ring on the outer side of the drill rod outer retainer; the drill rod penetrates through the top end of the drill rod protective sleeve to be connected with a permanent magnet, the outer side of the drill rod protective sleeve is provided with a pressure-resistant sleeve, and the hollow structure of the pressure-resistant sleeve can allow the drill rod and the permanent magnet to freely move in the vertical direction.
Further, an observation hole is formed in the upper end cover and used for observing the conditions in the inner layer of the kettle body; and a pressure sensor and a temperature sensor mounting hole are also arranged in the inner layer of the kettle body.
In a second aspect, an embodiment of the present invention provides an experimental measurement apparatus for simulating a deep-sea oil and gas drilling process, including the mechanical stirring tank, a drilling fluid circulation control system, a gas circulation control system, a temperature control system, and a data acquisition system as described above;
the drilling fluid circulation control system is used for controlling the injection and recovery of the drilling fluid in the mechanical stirring kettle and the renovation and storage of the drilling fluid;
the gas circulation control system is used for controlling the flowing process of gas in the mechanical stirring kettle;
the temperature control system is used for providing proper and constant operating temperature for the mechanical stirring kettle;
the data acquisition system is used for acquiring temperature and pressure parameters of the mechanical stirring kettle, and monitoring the flow velocity of gas in a gas pipeline of the gas circulation control system, the pressure difference of the gas inlet end and the gas outlet end of the mechanical stirring kettle, and the rotating speed and the torque of the mechanical stirring kettle.
Further, the drilling fluid circulation control system comprises a glass pipeline, a viscous fluid circulating pump, a drilling fluid blending bin and a manual fluid infusion pump;
the inlet and the outlet of the viscous fluid circulating pump are communicated with a drilling fluid inlet and a drilling fluid outlet through pipelines, and glass pipelines are arranged in the pipelines and used for qualitatively observing the appearance and rheological properties of the drilling fluid input and discharged into the mechanical stirring kettle;
the drilling fluid blending bin is a visual pressure container with mechanical stirring and is used for storing the drilling fluid discharged from the mechanical stirring kettle and supplementing fresh drilling fluid into the mechanical stirring kettle; an observation window is arranged on the side wall surface of the drilling fluid blending bin and used for observing the height of the liquid level of the drilling fluid; and the side wall surface of the drilling fluid blending bin is provided with a drilling fluid replenishing hole and is connected with a manual fluid replenishing pump.
Further, the gas circulation control system comprises a drilling fluid blending bin, a gas booster pump, a gas buffer tank and a gas cylinder; the gas circulation control system directly injects gas into the mechanical stirring kettle through the gas cylinder on one hand, and on the other hand, the gas exhausted from the mechanical stirring kettle and the drilling fluid blending bin is stored in the gas buffer tank after being pressurized by the gas booster pump and is injected into the visible mechanical stirring kettle again as high-pressure gas.
Further, the temperature control system is a constant-temperature air bath or a constant-temperature water bath to provide a constant temperature environment for the mechanical stirring kettle, the drilling fluid blending bin and the gas buffer tank.
Furthermore, the data acquisition system comprises a data acquisition instrument, resistance thermometers and pressure sensors which are distributed on the mechanical stirring kettle, the drilling fluid blending bin and the gas buffer tank, a gas flowmeter distributed in the gas circulation control system, and torque and rotating speed sensors which are distributed on the mechanical stirrers in the mechanical stirring kettle and the drilling fluid blending bin; the data acquisition instrument is used for displaying and recording the collected temperature, pressure, gas flow rate and torque and rotating speed of the mechanical stirrer in real time
Compared with the prior art, the invention has the beneficial effects that:
the mechanical stirring kettle for simulating deep sea oil and gas drilling provided by the embodiment can well restore the environment that high-pressure gas in a leakage stratum continuously leaks into a well in the drilling process of a drill bit, and can inspect and record the operation conditions of the drill bit and drilling fluid in an inner layer and the temperature and pressure change conditions.
According to the experimental device for simulating the drilling of the drill bit in the leaky stratum, the influence of formation of the dissolved gas and the gas hydrate in the drilling fluid on the rheological property of the drilling fluid and the drilling process of the drill bit can be more accurately inspected, and various properties of various additives of the drilling fluid in the leaky stratum can be analyzed. The device has clear structure and higher safety and operation fluency. In addition, the drilling fluid circulation control system and the high-pressure gas circulation control system fully consider the reutilization of the drilling fluid and the high-pressure gas, improve the safety of equipment, and also reduce the manufacturing cost and the environmental pollution. The device can simulate the low-temperature high-pressure environment from room temperature to minus 20 ℃ and 0-10MPa, and has guiding significance for researching the development of deep-sea oil and gas drilling technology.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a mechanical stirred tank;
FIG. 2 is a schematic structural view of a mechanical agitator;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a schematic diagram of the components of an experimental measurement device for simulating a deep sea oil and gas drilling process;
FIG. 5 is a schematic structural diagram of an experimental measurement device for simulating a deep sea oil and gas drilling process;
in the figure: 1. a kettle body; 2. a mechanical stirrer; 3. an annular wall surface; 4. a high pressure resistant glass conduit; 5. a high pressure resistant viscous fluid circulation pump; 6. a drilling fluid blending bin; 7. a manual liquid supplementing pump; 8. a gas booster pump; 9. a gas buffer tank; 10. a high pressure gas cylinder; 11, a data acquisition instrument; 1a, an observation hole; 1b, a high-pressure air inlet; 1c, a temperature sensor jack; 1d, a pressure sensor jack; 1e, a feed inlet; 1f, a discharge hole; 1g, high-pressure exhaust holes; 2a, a drill bit; 2b, a drill rod; 2c, bevel gears; 2d, protecting a drill rod sleeve; 2e, a drill rod inner retainer; 2f, a drill rod outer retainer; 2g, adjusting ring; 2h, pressure-resistant sleeve; 2i, rotating the sleeve; 2j, a belt pulley; 2k, and a motor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example 1:
referring to fig. 1-3, the high pressure resistant visible mechanical stirring kettle for simulating deep sea oil and gas drilling provided by the embodiment includes a kettle body 1, the kettle body 1 is a cylindrical high pressure resistant stainless steel container, an upper end cover of the kettle body is provided with a mechanical stirrer 2 capable of moving along an axial direction, two symmetrically distributed observation holes 1a, a high pressure air inlet hole 1b, a high pressure air outlet hole 1g, a temperature sensor jack 1c and a pressure sensor jack 1d, and a lower end cover of the kettle body is provided with a drilling fluid inlet 1e and a drilling fluid outlet 1 f. Be equipped with one in this internal portion of cauldron and carry out annular wall 3 of gas leakage, annular wall 3 is coaxial with the cauldron body 1 and separates the internal space of cauldron for inside and outside two-layer, and the inlayer is the environment of simulation drill bit drilling process in the gas-bearing stratum of leakage nature, and drilling fluid and mechanical agitator 2 that can follow axial displacement are placed to inside, and the space between 3 outsides of annular wall and the internal wall of cauldron 1 constitutes for the skin, and the skin is provided with high-pressure air inlet and is linked together with it. The annular wall 3 is mainly a porous medium which is permeable to air and impermeable to water. Therefore, when the equipment is operated, after high-pressure gas enters the outer layer of the kettle body 1, the high-pressure gas can slowly penetrate through the annular wall surface 3 and permeate into the gas phase space and drilling fluid of the inner layer, and the high-pressure gas of the outer layer can continuously permeate through the annular wall surface 3 due to the exhaust of the inner layer, so that the environment that the high-pressure gas in the leakage stratum continuously leaks into the well during the drilling process of the drill bit can be well restored. By matching with two observation holes 1a of the upper-resistant end cover and temperature and pressure sensors in temperature and pressure sensor jacks, the operating conditions of a drill bit and drilling fluid in the inner layer of the kettle body 1 and the temperature and pressure changes can be observed and recorded better.
Therefore, the mechanical stirring kettle for simulating deep sea oil and gas drilling provided by the embodiment can well restore the environment that high-pressure gas in a leakage stratum continuously leaks into a well in the drilling process of a drill bit, and can inspect and record the operation conditions of the drill bit and drilling fluid in an inner layer and the temperature and pressure change conditions.
The air-permeable and water-impermeable characteristics of the annular wall surface 3 play a key role in simulating the environment of continuous leakage of high-pressure gas into the well. The porous material filled in the annular wall surface 3 can be replaced by porous materials of different materials according to requirements, and mainly comprises one or more of materials such as silica gel, foamed polyethylene terephthalate or foamed polytetrafluoroethylene. The porous material is fixed by the reticular stainless steel wall surfaces on the inner side and the outer side of the annular wall surface 3, and the impact of the pressure difference between the inner layer and the outer layer of the annular wall surface 3 on the overall mechanical structure of the porous material can be buffered.
In addition, for better reduction drilling process, as shown in fig. 2, a mechanical stirrer 2 capable of moving along the axial direction in the kettle body 1 is further designed by combining the structure of a drill bit and the principle of a magnetic drive stirrer in practical application. Firstly, the drill bit appearance and the drill bit of operation form in practical application are more close, and the drill bit 2a of agitator head has 2, are conical and symmetric distribution in drilling rod 2b both sides, and its axis of rotation is mutually perpendicular with the axis of rotation of drilling rod 2b, through bevel gear 2c interconnect, and the drilling rod 2b outside is drilling rod protective sheath 2d for the rotation axis of fixed drill bit 2 a.
At the same time, the drill bit can be moved along the axis of rotation of the drill rod 2b during operation of the apparatus. When the drill bit 2a moves up and down, the drill rod 2a and the drill rod protection sleeve 2d move synchronously along the axial direction of the drill rod. A drill rod inner retainer 2e is arranged at the joint of the drill rod protective sleeve 2d and the upper end cover of the kettle body 1 and is used for reducing the horizontal vibration of the drill rod 2b and the drill rod protective sleeve 2 d; as shown in fig. 3, the inner drill rod holder 2e is provided with a key groove which cooperates with a key on the drill rod protecting sleeve 2d to prevent the drill rod 2b and the drill rod protecting sleeve 2d from rotating together and limit the up-and-down movement range of the drill bit 2 a. The drill rod 2b and the drill rod protective sleeve 2d extend out of the kettle body 1 through a central hole of an upper end cover in the kettle body 1 and are fixed through a drill rod outer retainer 2 f. The upper top end of the drill rod protective sleeve 2d is a hollow screw rod, the hollow screw rod and a nut embedded on the inner side of the drill rod outer retainer 2f form a ball screw, permanent magnets are embedded on the nut and an adjusting ring 2g on the outer side of the drill rod outer retainer and attract each other, the drill rod protective sleeve 2d is driven to move in the vertical direction by rotating the adjusting ring 2f on the outer side of the drill rod outer retainer, and then the height of the drill bit 2a in the kettle body 1 is adjusted. The drill rod 2b penetrates through the top end of the drill rod protective sleeve 2d to be connected with a permanent magnet, and the outer side of the drill rod protective sleeve is provided with a pressure-resistant sleeve 2 h. The hollow structure of the pressure sleeve 2h can allow the drill rod 2a and the permanent magnets to move freely in the vertical direction. The pressure-resistant sleeve 2h and the drill rod outer retainer 2f are connected and sealed with the upper end cover of the kettle body 1 through threads, and the inner space of the pressure-resistant sleeve is communicated with the space of the kettle body 1. The outer side of the pressure-resistant sleeve 2h is provided with a rotating sleeve 2i, a rotating shaft at the top of the rotating sleeve 2i is connected with a belt pulley 2j, the edge of the lower part of the rotating sleeve 2i is inlaid with a permanent magnet, the permanent magnet and the permanent magnet on the top end of the drill rod attract each other, and the drill rod is driven to rotate through rotation.
Example 2:
referring to fig. 4 to 5, the experimental measurement device for simulating a deep sea oil and gas drilling process provided in this embodiment includes a mechanical stirring tank, a drilling fluid circulation control system, a gas circulation control system, a temperature control system, and a data acquisition system shown in embodiment 1.
The drilling fluid circulation control system is used for controlling injection and recovery of the drilling fluid in the kettle body 1 and renovation and storage of the drilling fluid.
The gas circulation control system is used for controlling the flowing process of the high-pressure gas in the kettle body 1. Meanwhile, in order to reduce the consumption of high-pressure gas in the experiment and improve the use efficiency of the gas, the gas circulation control system is also provided with a gas recycling device.
The temperature control system is used for providing proper and constant operation temperature for the high-pressure resistant container such as the kettle body 1.
The data acquisition system is used for monitoring the temperature and pressure parameters of high-pressure resistant containers such as the kettle body 1 and the like, and monitoring the flow velocity of gas in a gas pipeline of the high-pressure gas circulation control system, the pressure difference of a gas inlet end and a gas outlet end of the kettle body 1 and the rotating speed and the torque of the mechanical stirrer.
Specifically, the drilling fluid circulation control system comprises two high-pressure-resistant glass pipelines 4, a high-pressure-resistant viscous fluid circulating pump 5, a drilling fluid blending bin 6, a manual liquid supplementing pump 7 and the like. When the system operates, drilling fluid in the drilling fluid blending bin 6 passes through the high-pressure resistant viscous fluid circulating pump 5 and is injected from a drilling fluid inlet in the kettle body 1, then the drilling fluid is discharged out of the kettle body 1 from a drilling fluid outlet, and is injected into the drilling fluid blending bin 6 after passing through the high-pressure resistant viscous fluid circulating pump 5 again, the drilling fluid is fully stirred in the drilling fluid blending bin 6, gas dissolved in the drilling fluid is released, meanwhile, formed gas hydrate is decomposed, the drilling fluid is further renovated, and finally, the drilling fluid waits to be injected into the kettle body 1 again by the high-pressure resistant viscous fluid circulating pump 5.
The high-pressure resistant glass pipeline 4 is respectively arranged on a feeding pipe and a discharging pipe of the drilling fluid and used for qualitatively observing the appearance and rheological characteristics of the drilling fluid input and discharged into the high-pressure resistant visual mechanical stirring kettle 1, and the position of the high-pressure resistant glass pipeline is between the high-pressure resistant visual mechanical stirring kettle 1 and the high-pressure resistant viscous fluid circulating pump 5.
The drilling fluid blending bin 6 is a visual pressure container with mechanical stirring and is used for storing the drilling fluid discharged from the high-pressure-resistant visual mechanical stirring kettle 1 and supplementing fresh drilling fluid into the kettle body 1. The pressure of the drilling fluid blending bin 6 during operation is not higher than 1MPa, so that the gas dissolved in the drilling fluid and the formed gas hydrate can be rapidly decomposed. The drilling fluid blending bin 6 is provided with a magnetic drive stirrer, which is beneficial to strengthening the heat and mass transfer process of the drilling fluid. And an observation window is arranged on the side wall surface of the drilling fluid blending bin 6 and used for observing the liquid level height of the drilling fluid, and the window is made of sapphire glass or organic glass. And a drilling fluid replenishing hole is formed in the side wall surface of the drilling fluid blending bin 6 and is connected with a manual fluid replenishing pump 7. The manual fluid infusion pump 7 is used for infusing and discharging a small amount of drilling fluid to the drilling fluid blending bin 6.
The high-pressure gas circulation control system comprises a drilling fluid blending bin 6, a gas booster pump 8, a gas buffer tank 9, a high-pressure gas bottle 10 and the like. The high-pressure gas circulation control system can directly inject gas into the high-pressure-resistant visible mechanical stirring kettle 1 through the high-pressure gas cylinder 10, can recover exhausted gas from the kettle body 1 and the drilling fluid blending bin 6, and stores the gas in the gas buffer tank 9 after being pressurized by the gas booster pump 8 and injects the gas into the kettle body 1 again as high-pressure gas, so that the gas is recycled.
The temperature control system is a constant temperature air bath or a constant temperature water bath to provide a constant temperature environment for the kettle body 1, the drilling fluid blending bin 6 and the gas buffer tank 9. However, the drilling fluid blending bin 6 and the gas buffer tank 9 have no strict requirement on temperature, and can be directly placed in a room temperature environment under the condition of not influencing the activity of additives of all components in the drilling fluid.
The high data acquisition system comprises a data acquisition instrument 11, resistance thermometers and pressure sensors distributed on the high-pressure-resistant visual mechanical stirring kettle 1, the drilling fluid blending bin 6 and the gas buffer tank 9, a gas flowmeter distributed in the high-pressure gas circulation control system, and torque and rotation speed sensors distributed on the mechanical stirrers in the kettle body 1 and the drilling fluid blending bin 6. The data acquisition instrument system only displays and records the collected temperature, pressure, gas flow rate, torque and rotating speed of the mechanical stirrer in real time.
In conclusion, the embodiment provides an experimental device for simulating the drilling of the drill bit in the leaky stratum, and the device can more accurately investigate the influence of formation of dissolved gas and gas hydrate in the drilling fluid on the rheological property of the drilling fluid and the drilling process of the drill bit and analyze various properties of various additives of the drilling fluid in the leaky stratum. The device has clear structure and higher safety and operation fluency. In addition, the drilling fluid circulation control system and the high-pressure gas circulation control system fully consider the reutilization of the drilling fluid and the high-pressure gas, improve the safety of equipment, and also reduce the manufacturing cost and the environmental pollution. The device can simulate the low-temperature high-pressure environment from room temperature to minus 20 ℃ and 0-10MPa, and has guiding significance for researching the development of deep-sea oil and gas drilling technology.
The device uses the actual deep sea oil and gas exploitation process as a research background, emphatically simulates the drill bit drilling process of the drill bit in a seepage gas-containing or hydrate-containing stratum, and further researches the influence of related components such as hydrate inhibitors in the drilling fluid on the viscosity, lubricity, drill chip coating property, drill bit drilling power and the like of the drilling fluid.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A mechanical stirring kettle for simulating deep sea oil and gas drilling comprises a kettle body, wherein an upper end cover is arranged on the upper end surface of the kettle body, and a lower end cover is arranged on the lower end surface of the kettle body; an annular wall surface capable of performing gas leakage is arranged in the kettle body, the annular wall surface is coaxial with the kettle body and divides the kettle body into an inner layer and an outer layer, the inner layer is used for containing drilling fluid and the mechanical stirrer, and the outer layer is a gas phase space; the gas phase space is communicated with an air inlet; and the inner layer space is communicated with a drilling fluid feed inlet, a drilling fluid discharge outlet and an exhaust hole.
2. The mechanical stirred tank for simulating deep sea oil and gas drilling as claimed in claim 1, wherein the reticular stainless steel wall surface of the annular wall surface is fixed, and the internal interlayer is one or more of air-permeable and water-impermeable silica gel, foamed polyethylene terephthalate or foamed polytetrafluoroethylene.
3. The mechanical stirring tank for simulating deep sea oil and gas drilling according to claim 1, wherein the mechanical stirrer comprises a drill rod, two drill bits are symmetrically distributed on two sides of one end of the drill rod, which is located in the inner space, the rotating shafts of the drill bits are perpendicular to the shaft of the drill rod and are connected with each other through bevel gears, and a drill rod protective sleeve is arranged outside the drill rod and used for fixing the rotating shaft of the drill bit.
4. The mechanical stirring tank for simulating deep sea oil and gas drilling as claimed in claim 3, wherein the drill bit can move along the rotation axis of the drill rod during the operation of the mechanical stirrer, and when the drill bit moves up and down, the drill rod and the drill rod protective sleeve move synchronously along the axial direction of the drill rod; a drill rod inner retainer is arranged at the joint of the drill rod protective sleeve and the upper end cover; a key groove is formed in the inner retainer of the drill rod and is matched with a key on the drill rod protective sleeve; the drill rod and the drill rod protective sleeve extend out of the kettle body through a central hole of the upper end cover and are fixed through a drill rod outer retainer; the upper top end of the drill rod protective sleeve is a hollow screw rod, the hollow screw rod and a nut nested on the inner side of the drill rod outer retainer form a ball screw, permanent magnets are embedded in the nut and an adjusting ring on the outer side of the drill rod outer retainer and attract each other, and the drill rod protective sleeve is driven to move in the vertical direction by rotating the adjusting ring on the outer side of the drill rod outer retainer; the drill rod penetrates through the top end of the drill rod protective sleeve to be connected with a permanent magnet, the outer side of the drill rod protective sleeve is provided with a pressure-resistant sleeve, and the hollow structure of the pressure-resistant sleeve can allow the drill rod and the permanent magnet to freely move in the vertical direction.
5. The mechanical stirred tank for simulating deep sea oil and gas drilling of claim 4, wherein a viewing hole is provided in the upper end cover for viewing conditions within the tank body; and a pressure sensor and a temperature sensor mounting hole are also arranged in the inner layer of the kettle body.
6. An experimental measurement device for simulating a deep sea oil and gas drilling process, which is characterized by comprising the mechanical stirring kettle, a drilling fluid circulation control system, a gas circulation control system, a temperature control system and a data acquisition system of claim 5;
the drilling fluid circulation control system is used for controlling the injection and recovery of the drilling fluid in the mechanical stirring kettle and the renovation and storage of the drilling fluid;
the gas circulation control system is used for controlling the flowing process of gas in the mechanical stirring kettle;
the temperature control system is used for providing proper and constant operating temperature for the mechanical stirring kettle;
the data acquisition system is used for acquiring temperature and pressure parameters of the mechanical stirring kettle, and monitoring the flow velocity of gas in a gas pipeline of the gas circulation control system, the pressure difference of a gas inlet end and a gas outlet end of the mechanical stirring kettle, and the rotating speed and the torque of the mechanical stirring kettle.
7. The experimental measurement device for simulating a deep sea oil and gas drilling process according to claim 6, wherein the drilling fluid circulation control system comprises a glass pipeline, a viscous fluid circulation pump, a drilling fluid blending bin and a manual fluid infusion pump;
the inlet and the outlet of the viscous fluid circulating pump are communicated with a drilling fluid inlet and a drilling fluid outlet through pipelines, and glass pipelines are arranged in the pipelines and used for qualitatively observing the appearance and rheological properties of the drilling fluid input and discharged into the mechanical stirring kettle;
the drilling fluid blending bin is a visual pressure container with mechanical stirring and is used for storing the drilling fluid discharged from the mechanical stirring kettle and supplementing fresh drilling fluid into the mechanical stirring kettle; an observation window is arranged on the side wall surface of the drilling fluid blending bin and used for observing the height of the liquid level of the drilling fluid; and the side wall surface of the drilling fluid blending bin is provided with a drilling fluid replenishing hole and is connected with a manual fluid replenishing pump.
8. The experimental measurement device for simulating a deep sea oil and gas drilling process as claimed in claim 6, wherein said gas circulation control system comprises a drilling fluid blending bin, a gas booster pump, a gas buffer tank, a gas cylinder; the gas circulation control system directly injects gas into the mechanical stirring kettle through the gas cylinder on one hand, and on the other hand, the gas exhausted from the mechanical stirring kettle and the drilling fluid blending bin is stored in the gas buffer tank after being pressurized by the gas booster pump and is injected into the visible mechanical stirring kettle again as high-pressure gas.
9. The experimental measurement device for simulating a deep sea oil and gas drilling process according to claim 8, wherein the temperature control system is a constant temperature air bath or a constant temperature water bath to provide a constant temperature environment for the mechanical stirred tank, the drilling fluid blending bin and the gas buffer tank.
10. The experimental measurement device for simulating a deep sea oil and gas drilling process of claim 8, wherein the data acquisition system comprises a data acquisition instrument, resistance thermometers and pressure sensors distributed on the mechanical stirring kettle, the drilling fluid blending bin and the gas buffer tank, a gas flow meter distributed in the gas circulation control system, and torque and rotation speed sensors distributed on the mechanical stirrer in the mechanical stirring kettle and the drilling fluid blending bin; the data acquisition instrument is used for displaying and recording the collected temperature, pressure, gas flow rate and torque and rotating speed of the mechanical stirrer in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350758.7A CN111081132B (en) | 2019-12-24 | 2019-12-24 | Mechanical stirring kettle and experimental measurement device for simulating deep sea oil and gas drilling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350758.7A CN111081132B (en) | 2019-12-24 | 2019-12-24 | Mechanical stirring kettle and experimental measurement device for simulating deep sea oil and gas drilling process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111081132A true CN111081132A (en) | 2020-04-28 |
| CN111081132B CN111081132B (en) | 2022-01-04 |
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| CN111081132B (en) | 2022-01-04 |
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